There's the first class 劍門士, the Swordsman Soldier, he relies on swords to inflict quick damage to many monsters, and is capable of quick movement to move from monster to monster. He isn't limited to just one sword, but can even use two!

The second class 神槍手, the Sharpshooter, capable of sending out a wide variety of ammo, bombs, and even a nice pirate robot to help inflict pain on monsters. He also wears a nice hat.

The third class is 帝國騎士, the Imperial Knight. Wielding a shield and axe, he can inflict devastating attacks to monsters, or the ground in order for an earth shattering impact.

The fourth class is 日曜祭司, The Shining Priest. She isn't only capable of casting healing magic, but she can summon fire and bend it to her will in the form of fireballs and fire tornadoes.

The fifth and class is 風暴使者, the Storm Envoy. Using the might of the storm, the Envoy can cast shocking displays of power and can target multiple monsters with ease. With wind, she can even make monsters levitate into the air, and using both, cause massive destruction.

By the way, the classes aren't gender-locked. Look at the class trailer for a more detailed look at what each class can do!